okay I have redone most of the interior wiring from a previous owners nightmare job on a A/C Switch it burnt to a crisp ground wire done poorly was arching to the hot side which got into the main harness melted a bunch of wires they are replaced now. As well as the blower motor wire I have hit most of the toy forums for answers. I just blew the fuse link at the battery as I added heat shielded wire to the blower motor could I have them back wards.

 

Yes. ...

 

Break out your Meter only way to know for sure

Could be a Physical damage to the blower Motor Resister or the Switch

Might be damage to the blower Motor causing the short

Might be damage you missed

Reversed wires at the Blower Motor will just spin the motor the opposite direction